Mobile Terminal Having Touch Screen and Function Controlling Method of the Same

ABSTRACT

A method for providing a graphical user interface on a display of a device includes: displaying a photograph an image on the display of the device, receiving a touch input made on the display, superimposedly displaying a plurality of control guides at a location corresponding to the touch input over the displayed photograph image in response to receiving the touch input, receiving a drag input corresponding to one of the plurality of control guides displayed on the display, removing adjusting a display characteristic of at least one of the plurality of control guides in response to receiving the drag input, and displaying the adjusted plurality of control guides on the display.

CROSS REFERENCE TO RELATED APPLICATION

This is a continuation-in-part application of U.S. patent application Ser. No. 14/052,406 filed in the U.S. Patent and Trademark Office on Oct. 11, 2013, which is a continuation application of U.S. patent application Ser. No. 12/335,772, filed in the U.S. Patent and Trademark Office on Dec. 16, 2008, which claims priority from Korean Patent Application No. 10-2007-0133866, filed in the Korean Intellectual Property Office on Dec. 20, 2007, the disclosures of which are incorporated herein by reference in their entireties.

BACKGROUND

1. Field

Methods and apparatuses consistent with exemplary embodiments relate to a mobile terminal and, more particularly, to a method of controlling a function of a mobile terminal, which has a touch screen to provide an interaction guide thereon.

2. Discussion of the Background

Advances in information and communication technologies have enabled a mobile terminal to perform multi-functions. For example, in addition to call processing, an advanced mobile terminal may support various supplementary functions such as a camera function, Digital Multimedia Broadcasting (DMB), and a Bluetooth function.

The mobile terminal may include an input unit, such as a keypad, to input control commands to control a variety of functions. However, it may be inconvenient for a user to manipulate the keypad with his/her finger because the keypad may be relatively small compared to his/her finger. Therefore, a mobile terminal may be provided with a touch screen instead of a keypad. However, a user using the mobile terminal having a touch screen may have difficulty in controlling various functions if the user is not familiar with processes of performing a function when a function is to be performed, which may result in unnecessary multiple touches of the touch screen.

SUMMARY

Aspects of the exemplary embodiments provide a mobile terminal having a touch screen and a method of controlling a function thereof that may enable a user to control a variety of functions with ease.

Additional aspects will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the exemplary embodiments.

According to an aspect of an exemplary embodiment, there is provided a method of controlling a function of a mobile terminal having a touch screen. The method includes displaying a function execution screen on the touch screen, displaying a control interaction guide on the function execution screen in response to a request to display the control interaction guide, the control interaction guide to guide at least one control command to be executed on the function execution screen, determining a control command corresponding to a drag if the drag is detected on the touch screen, and executing a function corresponding to the control command on the function execution screen.

According to an aspect of an exemplary embodiment, there is provided a mobile terminal including a touch screen including a touch panel to detect a drag and drop generated on the function execution screen and a display unit to display a function execution screen, a control unit to control the display unit to display of a control interaction guide to guide at least one control command to be executed on the function execution screen in response to a request to display the control interaction guide, to determine a control command corresponding to a drag generated on the function execution screen, and to execute a function corresponding to the control command on the function execution screen, and a memory unit to store the control command to be executed on the function execution screen and the control interaction guide to be displayed on the function execution screen.

According to an aspect of an exemplary embodiment, there is provided a method of controlling a function of a mobile terminal having a touch screen including displaying a function execution screen on the touch screen, searching for a stored control interaction guide if an approach is detected, displaying the stored control interaction guide if the stored control interaction guide exists, stopping the display of the control interaction guide if a touch on the display control interaction guide is detected, calculating drag characteristic values when a drag is detected, determining a control command corresponding to the drag characteristic values, and executing a function corresponding to the control command.

It is to be understood that both the foregoing general description and the following detailed description of exemplary embodiments are exemplary.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of are incorporated in and constitute a part of this specification, illustrate aspects of the exemplary embodiments, and together with the description serve to explain the principles of the disclosure.

FIG. 1 shows a configuration of a mobile terminal having a touch screen configured to perform a function according to an exemplary embodiment.

FIG. 2 is a flow chart showing a method of performing a function of a mobile terminal according to another exemplary embodiment.

FIGS. 3A-3E are screen representations showing the procedure of FIG. 2.

FIG. 4 is a flow chart showing a method of performing a function of a mobile terminal according to another exemplary embodiment.

FIG. 5 is a flow chart showing method of performing a function of a mobile terminal according to another exemplary embodiment.

FIGS. 6A-6B, FIG. 7, FIG. 8, FIG. 9A and FIG. 9B are screen representations showing the procedure of FIG. 5.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The exemplary embodiments are described more fully hereinafter with reference to the accompanying drawings, in which aspects of the exemplary embodiments are shown. The exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure is thorough, and will fully convey the scope of the disclosure to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals in the drawings denote like elements.

It will be understood that when an element or layer is referred to as being “on” or “connected to” another element or layer, the element or layer can be directly on or directly connected to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on” or “directly connected to” another element or layer, there are no intervening elements or layers present.

In an exemplary embodiment, the term “function execution screen” refers to a displayed screen of a mobile terminal when a particular function is performed. The term “control command” refers to a control command to perform a sub-function that is to be performed through the function execution screen when a particular function is performed. Such a control command may be, for example a zoom-in command or a zoom-out command when performing a camera function, or a volume control command or a playback command of a previous file or next file when performing an audio function. Herein, the control command may be a command to move to an upper-level menu or a lower-level menu or to a next menu of the same level. The control command may be performed in response to a user manipulation.

The term “control interaction guide” refers to a display image that guides control commands to be executed on a function execution screen of a mobile terminal. At this time, either none or at least one control interaction guide may be present according to a function execution screen. The control interaction guide may further include a direction image that shows a direction in which a user should move to manipulate corresponding control commands. Also, the control interaction guide may further include a symbol image that indicates corresponding control commands.

The term “touch” refers to an action in which a user contacts a touch screen using a touch device, typically a stylus or a finger. The term “drag” refers to an action in which a user moves about the touch device along the touch screen. The term “drop” refers to an action in which a user releases contact from the touch screen.

FIG. 1 shows a configuration of a mobile terminal 100 according to an exemplary embodiment. For the purpose of the following description, the mobile terminal 100 is embodied as a mobile phone.

Referring to FIG. 1, the mobile terminal 100 includes a wireless unit 110, a touch screen 120, a proximity sensor 130, a memory unit 140, a control unit 150, and an audio processor 160.

The wireless communication unit 110 performs wireless communication operations for the mobile terminal 100. The wireless unit 110 includes a radio frequency (RF) transmitter to upconvert the frequency of a signal to be transmitted and amplify the signal, and an RF receiver to low-noise amplify a received signal and downconvert the frequency of the received signal.

The touch screen 120 includes a display unit 121 and a touch panel 123. The display unit 121 displays a state of the mobile terminal 100. The display unit 121 may include an LCD, and in this case includes an LCD control unit, a memory to story display data, and an LCD display element. The touch panel 123 may be mounted on or integral with the display unit 121 and may include a touch sensor and a signal converter. The touch sensor detects control commands of a touch, a drag, and a drop from a change in magnitude of a physical parameter, such as pressure or another force, or a change in magnitude of an electrical parameter, such as capacitance or resistance. The signal converter converts the change in the magnitude of the physical or electrical parameter into a touch signal.

The proximity sensor 130 detects a presence of objects near to the touch screen 120 without any physical contact. The proximity sensor 130 detects, for instance, a variation of a temperature or luminous intensity. Herein, at least one proximity sensor 130 may be installed on the rear of the display unit 121 and on a side of the display unit 121. When a single proximity sensor 130 is installed, the proximity sensor 130 may be located to detect the movement of a user's hand toward the mobile terminal.

The memory unit 140 includes a program memory section and a data memory section. The program memory section stores programs of control commands to control the mobile terminal 100 and programs to perform a function using the touch screen 123 according to an exemplary embodiment. The data memory section stores data generated during the execution of a program of the mobile terminal 100. The memory unit 140 stores a control command to be executed on each function execution screen according to an exemplary embodiment. Further, the memory unit 140 stores a control interaction guide for guiding a control command. The memory unit 140 also stores characteristic values of a control interaction guide including a degree of transparency, a degree of contrast, a color attribute and a size thereof, and text information describing a control command corresponding to a control interaction guide according to an exemplary embodiment. The control unit 150 controls the overall operation of the mobile terminal 100. The control unit 150 performs a signal processing function to encode and modulate a signal to be transmitted, and to demodulate and decode a received signal. The control unit 150 may include a modulator/demodulator (modem) and a coder/decoder (codec).

In particular, the control unit 150 controls display of a function execution screen when executing a function according to an exemplary embodiment. Further, the control unit 150 controls the display unit 121 to display a control interaction guide on the function execution screen by retrieving the control interaction guide from the memory unit 140 in response to a user request to display the control interaction guide while displaying the function execution screen. Herein, the control unit 150 may recognize an approach to the touch screen 120 through a proximity sensor 130 as a request to display a control interaction guide.

The control unit 150 may remove a control interaction guide from the function execution screen if an occurrence of a touch on the touch screen 120 is detected while the control interaction guide is being displayed. Further, the control unit 120 may remove a control interaction guide from the function execution screen if a time period for displaying the guide elapses while the control interaction guide is being displayed. In addition, the control unit 150 controls the mobile phone by detecting a control command corresponding to a drag if the drag is detected on the touch screen 120.

The control unit 150 may retain a control interaction guide on the function execution screen if a drag is detected on the touch screen 120, and the control unit 150 may change a characteristic value of a control interaction guide, including a degree of transparency, a degree of contrast, a color attribute and a size thereof, and text information describing a control command corresponding to the control interaction guide, while maintaining the control interaction guide on the function execution screen. Also, the control unit 150 may move a control interaction guide in response to the movement of the touch and the drag.

The audio processor 160 reproduces an audio signal from an audio codec through a speaker SPK, and transmits an audio signal from a microphone MIC to the audio codec.

FIG. 2 is a flow chart showing a method of performing a function of a mobile terminal according to another exemplary embodiment of the present invention. FIG. 3A, FIG. 3B, FIG. 3C, FIG. 3D, and FIG. 3E are screen representations showing processes of performing a function according to the method of FIG. 2. Specifically, FIG. 3A, FIG. 3B, FIG. 3C, FIG. 3D, and FIG. 3E are screen representations when a camera function is performed. In detail, FIG. 3A shows a touch screen when a particular function is to be performed. FIG. 3B shows the touch screen when an approach to the touch screen is detected. FIG. 3C shows the touch screen when a drag is detected on the touch screen. FIG. 3D shows the touch screen when a drop is detected on the touch screen. FIG. 3E shows the touch screen after the function is performed.

Referring to FIG. 2, a function execution screen is displayed on the touch screen 120 (S211) when a function is to be performed, as shown in FIG. 3A. For example, the control unit 150 may display a function execution screen as a preview screen when performing a camera function. If the control unit 150 detects an approach to the touch screen 120 (S213), the control unit 150 searches for a control interaction guide corresponding to the displayed function execution screen stored in the memory unit 140 (S215).

The control unit 150 determines if a control interaction guide to be displayed on the function execution screen exists (S217). In other words, the control unit 150 determines if a control command to be executed on the function execution screen corresponding to a function execution screen exists. If the control unit 150 determines that a control interaction guide stored in a memory unit 140 exists, the control unit 150 displays the control interaction guide (S219), as shown in FIG. 3B. For example, the control unit 150 may display a control interaction guide to guide a control command to be performed on the preview screen such as a zoom-in command, a zoom-out command, a brightness command, or a shot command.

If the control unit 150 detects a touch on the touch screen 120 (S221), the control unit 150 removes the control interaction guide from the function execution screen (S223), as shown in FIG. 3C.

If the control unit 150 detects a drag generated on the touch screen 120 (S225), the control unit determines changes of the drag coordinates and calculates values of drag characteristics therefrom (S227). For example, the control unit 150 calculates the distance, direction, and velocity of the drag. Next, the control unit 150 determines a control command to be executed on the function execution screen corresponding to the calculated drag characteristic values and executes a function corresponding to the determined control command (S229), as shown in FIG. 3D. For example, if the distance of the drag is X pixels, and the direction of the drag is upward, the control unit enlarges the preview screen by Y times (where Y=MX, M is a constant number).

The memory unit 140 may store a control command to be executed corresponding to specific drag characteristic values in advance. The control unit 150 may further display the calculated drag characteristic values on the function execution screen (not shown).

If the control unit 150 detects a drop generated on the touch screen 120 (S231), the control unit 150 terminates the function execution procedure, as shown in FIG. 3E. When the drop is detected, the control unit 150 may further control to perform functions determining a control command to be executed on the function execution screen corresponding to the drop and a subsequent touch (not shown in FIG. 2). If a drop is not detected through the touch screen 120 at step S231, the process returns to step S225 and the control unit 150 may repeat steps S225 to S231.

If a drop is detected at step S231, the control unit 150 may further determine a control command to be executed on the function execution screen corresponding to the touch and drop (not shown in FIG. 2).

In the exemplary embodiments, a control interaction guide is displayed when an approach to a touch screen is detected while a function execution screen of a mobile terminal is being displayed. However, the display is not limited thereto. For example, exemplary embodiments can be realized by displaying various interaction guides in response to approaching different positions of a touch screen while displaying a function execution screen. In addition, the display can be realized by detecting a request to display a control interaction guide while a function execution guide of a mobile terminal is being displayed. For example, if a touch or a drop is detected on a touch screen while a control interaction guide is being displayed on a function execution screen of a mobile terminal, the touch or drop may be regarded as a request to display a control interaction guide.

In the exemplary embodiments, a control interaction guide is removed when a touch is detected while a control interaction guide is being displayed on the function execution screen of a mobile terminal. However, the display is not limited thereto. Exemplary embodiments may be realized by detecting a request to remove a control interaction guide from a function execution screen of a mobile terminal. For example, a display period to display various control interaction guides may be stored in a memory unit of a mobile terminal. If the preset display period of a control interaction guide elapses while the control interaction guide is being displayed on a function execution screen of a mobile terminal, the elapse of the preset display period may be regarded as a request to remove the control interaction guide from the function execution screen.

According to exemplary embodiments, when executing a function of a mobile terminal, a control command to be executed on a function execution screen may be guided by displaying a control interaction guide corresponding to the control command on a function execution screen. Thereby, a user of a mobile terminal may conveniently manipulate various functions of the mobile terminal.

FIG. 4 is a flow chart showing a method of performing a function of a mobile terminal according to another exemplary embodiment. In this exemplary embodiment, a detailed explanation of a configuration of a mobile terminal is omitted, as the configuration of a mobile terminal in this exemplary embodiment is similar to the configuration of a mobile terminal in the exemplary embodiment of the present invention shown in FIG. 1, except that the mobile terminal of the present exemplary embodiment may not include a proximity sensor.

Referring to FIG. 4, a function execution screen is displayed on the touch screen 120 when a function is to be performed (S411). If the control unit 150 detects a touch on the touch screen 120 (S413), the control unit 150 searches for a control interaction guide corresponding to the touch on the displayed function execution screen stored in the memory 140.

If the control unit 150 determines that a control interaction guide to be displayed on a function execution screen exists (S417), the control unit 150 displays the control interaction guide (S419).

If the control unit 150 detects a drag generated on the touch screen 120 (S421), the control unit 150 removes the control interaction guide from the function execution screen (S423). The control unit 150 determines changes of the drag coordinates and calculates values of drag characteristics therefrom (S425). For example, the control unit 150 calculates the distance, direction, and velocity of the drag. The control unit 150 then determines a control command to be executed on the function execution screen corresponding to the calculated drag characteristic values and executes a function corresponding to the determined control command (S427). Herein, a control command corresponding to specific drag characteristic values may be stored in the memory unit 140 in advance. The control unit 150 may further display the calculated drag characteristic values corresponding to the control command on the function execution screen (not shown).

If the control unit 150 detects a drop generated on the touch screen 120 (S429), the control unit 150 terminates the function execution procedure. If a drop is not detected through the touch screen 120 at step S429, the control unit 150 may repeat steps S421 to S429.

When the drop is detected, the control unit 150 may further control the mobile terminal 100 to perform functions determining a control command to be executed on the function execution screen corresponding to the drop and a subsequent touch (not shown in FIG. 4). If a drop is not detected through the touch screen 120 at step S429, the process returns to step S421 and the control unit 150 may repeat the S421 to S429.

In another exemplary embodiment, if the control unit 150 detects a touch on the touch screen 120 (S521), the control unit 150 retains the control interaction guide on the function execution screen (S523), and changes characteristics of the control interaction guide including a transparency, a contrast, a color and a size thereof, and text information describing a control command corresponding to the control interaction guide, as shown in FIG. 6A. Also, the control interaction guide may be moved in response to the movement of the touch and the drag, as shown in FIG. 6B.

FIG. 5 is a flow chart showing a method of performing a function of a mobile terminal according to another exemplary embodiment. In this exemplary embodiment, a detailed explanation of a method of performing a function of a mobile terminal is omitted, as the method of performing a function of a mobile terminal in this exemplary embodiment is similar to the method of performing a function of a mobile terminal in the exemplary embodiment of the present invention shown in FIG. 4, except that the mobile terminal of the present exemplary embodiment may retain a control interaction guide on the function execution screen after detecting a drag generated on the screen and change characteristics of the control interaction guide including a transparency, a contrast, a color and a size thereof, and text information describing a control command corresponding to the control interaction guide.

Referring to FIG. 5, if the control unit 150 detects a drag generated on the touch screen 120 (S521), the control unit 150 retains the control interaction guide on the function execution screen, and changes characteristic values of the control interaction guide (S523). The control unit 150 determines changes of the drag coordinates and calculates values of drag characteristics therefrom (S525). For example, the control unit 150 calculates the distance, direction, and velocity of the drag. The control unit 150 then determines a control command to be executed on the function execution screen corresponding to the calculated drag characteristic values, and executes a function corresponding to the determined control command (S527).

The memory unit 140 may store characteristic values of a control interaction guide including a degree of transparency, a degree of contrast, a color attribute and a size thereof, and text information describing a control command corresponding to the control interaction guide in advance.

FIG. 6A, FIG. 6B, FIG. 7, FIG. 8, FIG. 9A, and FIG. B are screen representations showing process of performing a function according to the method of FIG. 5. Specifically, FIG. 6A, FIG. 6B, FIG. 7, FIG. 8, FIG. 9A, and FIG. 9B are screen representation when a camera function is performed.

FIG. 6A shows a touch screen when a transparency of a control interaction guide is controlled while a plurality of the control interaction guide is maintained on the function execution screen. If the control unit 150 detects a drag generated on the touch screen 120, a transparency of the control interaction guide is controlled while a plurality of the control interaction guide is maintained on the function execution screen. For example, when a user touches the touch screen 120 and drags his or her finger on the touch screen 120, the transparency of the control interaction guide may be increased, as shown in FIG. 6A. And the control interaction guide may be moved in response to the touch and drag detected, as shown in FIG. 6B.

FIG. 7 shows a touch screen when a transparency of a control interaction guide is controlled while the control interaction guide corresponding to a direction of the drag is maintained on the function execution screen. If the control unit 150 detects a drag generated on the touch screen 120 (S521), a transparency of the control interaction guide is controlled while the control interaction guide corresponding to a direction of the drag is maintained on the function execution screen. For example, one directional arrow corresponding to a direction of the drag may be maintained on the function execution screen and the transparency of the directional arrow may be increased as shown in FIG. 7.

FIG. 8. shows a touch screen when a contrast of a control interaction guide is controlled in response to the characteristic of the position where the touch is detected. If the control unit 150 detects a drag generated on the touch screen 120 (S521), a contrast of the control interaction guide is controlled in response to the characteristic of the position, where the touch is detected, including a color, a contrast and a transparency, and the text information describing the control command may be changed in accordance with the contrast thereof. For example, when the control unit 150 detects a drag generated on a cloud of the image, the contrast of the control interaction guide may be changed in response to the color, the contrast or the transparency of the position where the cloud is placed, as shown in FIG. 8.

FIG. 8 also shows a touch screen when text information describing the control command corresponding to the control interaction guide is controlled in response to the characteristic of the position where the touch is detected.

FIG. 9A and FIG. 9B show a touch screen when a size of a control interaction guide is controlled while characteristics of the control interaction guide is changed. If the control unit 150 detects a drag generated on the touch screen 120 (S521), a size of a control interaction guide is changed while characteristics of the control interaction guide is changed. For example, the size of the control interaction guide may become larger or smaller than the original directional arrows, and the transparency may be changed while the control interaction guide is resized, as shown in FIG. 9A and FIG. 9B.

A method of detecting a control interaction guide while a control interaction guide is being displayed on a function execution screen is described in this exemplary embodiment, but is not limited thereto. Exemplary embodiments may be realized by displaying various interaction guides in response to approaching different positions of a touch screen while a function execution screen is being displayed.

A method of removing a control interaction guide from a function execution screen is described in this exemplary embodiment, but is not limited thereto. Exemplary embodiments may be implemented by detecting a request to remove a control interaction guide from a function execution screen. For example, a display period to display a specific interaction guide may be stored in a memory unit of a mobile terminal. If the preset display period elapses while the specific interaction guide is being displayed, the elapse of the preset display period may be regarded as a request to remove the control interaction guide from the function execution screen.

As apparent from the above description, there is provided a display of a control command that may be executed by a user on a function execution screen of a mobile terminal by displaying the control interaction guide on the function execution screen. As a result, a user may easily manipulate various functions using a touch screen of a mobile terminal.

It will be apparent to those skilled in the art that various modifications and variation can be made without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this disclosure within the scope of the appended claims and their equivalents. 

What is claimed:
 1. A method for providing a graphical user interface on a display of a device, the method comprising: displaying an image on the display of the device; receiving a touch input made on the display; superimposedly displaying a plurality of control guides over the displayed image in response to receiving the touch input; receiving a drag input on the display; adjusting a display characteristic of at least one of the plurality of control guides in response to receiving the drag input; and displaying the adjusted plurality of control guides on the display.
 2. The method according to claim 1, wherein the display characteristic comprises a position of the plurality of control guides on the display.
 3. The method according to claim 2, wherein the plurality of control guides are superimposedly displayed at a first location on the display in response to receiving the touch input and the adjusted plurality of control guides are displayed at a second location on the display in response to receiving the drag input.
 4. The method according to claim 1, wherein the display characteristic comprises at least one of a transparency, a contrast, a color, a size, and text information describing a control command corresponding to at least one of the plurality of control guides.
 5. The method according to claim 4, further comprising: determining a drag characteristic value of the drag.
 6. The method according to claim 5, wherein the drag characteristic value of the drag comprises at least one of a distance, a velocity, and a direction of the drag.
 7. The method according to claim 6, wherein the adjusting comprises adjusting the display characteristic of the at least one of the plurality of control guides based on the at least one of the distance, the velocity, and the direction of the drag.
 8. The method according to claim 6, wherein the drag corresponds to one of the plurality of control guides, and wherein the method further comprises: determining a control command to be executed corresponding to the one of the plurality of control guides and the at least one of the distance, the velocity, and the direction of the drag; and executing a function of the device corresponding to the determined control command.
 9. The method according to claim 8, wherein the adjusting comprises: adjusting the display characteristic of the one of the plurality of control guides.
 10. The method according to claim 9, wherein the adjusting further comprises: omitting control guides of the plurality of control guides that are not adjusted from the display.
 11. The method according to claim 6, wherein the adjusting comprises adjusting the display characteristic of all of the plurality of control guides.
 12. The method according to claim 6, further comprising: detecting a characteristic of the image at a position of the drag, and wherein the adjusting comprises adjusting the display characteristic of the at least one of the plurality of control guides based on the at least one of the distance, the velocity, and the direction of the drag and the characteristic of the image at the position of the drag.
 13. The method according to claim 1, wherein the plurality of control guides are a plurality of directional arrows superimposed over the displayed image.
 14. The method according to claim 13, wherein the plurality of control guides are respectively associated with a plurality of different controls that adjust display characteristics of the photograph image.
 15. The method according to claim 13, wherein the plurality of control guides are associated with text information describing the adjusting the display characteristic.
 16. The method according to claim 13, wherein the plurality of directional arrows are respectively arranged to indicate different directions.
 17. The method according to claim 1, wherein the plurality of control guides correspond to a plurality of functions for adjusting a display characteristic of the image, and wherein the display characteristic is at least one of a brightness of the image and a magnification of the image.
 18. A non-transitory computer-readable medium having recorded thereon a program, which when executed by a computer causes the computer to execute a method for providing a graphical user interface on a display of a device, the method comprising: displaying an image on the display of the device; receiving a touch input made on the display; superimposedly displaying a plurality of control guides over the displayed image in response to receiving the touch input; receiving a drag input on the display; adjusting a display characteristic of at least one of the plurality of control guides in response to receiving the drag input; and displaying the adjusted plurality of control guides on the display.
 19. A display device comprising: a display configured to display an image; a memory configured to store display characteristics of a plurality of control guides; and a processor configured to control the display to display an image on the display, receive a touch input made on the display, superimposedly display a plurality of control guides over the displayed image in response to receiving the touch input, receive receiving a drag input on the display, adjust a display characteristic of at least one of the plurality of control guides in response to receiving the drag input; display the adjusted plurality of control guides on the display. 